Mastic sealing for building owners and managing agents in Custom House, Greater London
Commercial sealant work in Custom House for contractors, FMs and building owners: mastic sealing for building owners, managing agents and housing associations, with a fixed quote first.
- Leaks at window and door perimeters
- Patchy repairs in mismatched sealant
- Draughts at frames across a block
Mastic sealing for Custom House sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Mastic sealing for commercial buildings in Custom House
We diagnose before we prescribe: which joints have failed, why, and whether sealant is the right answer. Old mastic is removed entirely, the faces prepared, primer used where the maker specifies it and new sealant tooled in and backing rod used wherever a joint is deep. If you have damp patches beside frames and draughts at frames across a block, we can put it right. A specialist sealant contractor works differently from a general builder: in Custom House, that means joint design, primers and backing rod as standard.
Across Greater London, Custom House included, the ULEZ applies, and parking and loading rules differ from street to street. For a block or estate, it helps to know where we can park and stage materials.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Location
- Custom House (E16, E13)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Common questions from Custom House clients
Do you cover business parks and estates near Custom House, such as Greenshields Industrial Estate?
Yes. Our area takes in Custom House and its surroundings, with estates and business parks such as Greenshields Industrial Estate included. Photos and a short description are enough for a first look.
We manage a building near Custom House station. Can you help?
Yes, we work for agents, landlords and housing associations with blocks of every size. We work to your notice and access arrangements.
Does weather matter for sealant work?
It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.
What if the old mastic contains asbestos?
Some mastics in pre-2000 buildings contain asbestos. We check the asbestos register or survey before disturbing it and suspect material is tested first.
When can the area be used after sealing?
Curing time varies by product, and we confirm it on the day, and sign any area that should be left alone.
How long do sealant joints last?
It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.
What guarantee do you give on resealing?
Our workmanship carries a 12-month guarantee, backed by public liability insurance.
How a job runs
At the end of each section, we remove the tape, clean down and inspect every joint, ready for your sign-off. If an area should be left alone while the sealant cures, we say how long and put signs out. For a job in Custom House, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we will schedule to suit.
- We check the asbestos register for older buildings and look at the joints.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- Joint faces are cleaned, backed and resealed.
- We finish each building before moving to the next.
What we need from you
- Let building users know which areas are affected
- Send any specification or drawings in advance
- Share your working hours and any access restrictions
Getting a fixed quote
Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To start the process, give us a call on 01277 525 020 or use the quote form.
Advice
Planned mastic for Custom House portfolios
The 2 miles around Custom House include six care or nursing homes. Frame mastic on care buildings is best renewed elevation by elevation, with the manager deciding timings. For a London block, the agent or landlord usually handles notices to residents and access to flats. We fit the programme to your notice periods.
Churches, halls and community buildings such as St Matthew's Church are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time. If you manage student housing near a university such as Ravensbourne University London (1.1 miles west of Custom House), the summer turnaround is the time for mastic. Site managers at schools like St Joachim's Catholic Primary School can fit frame mastic into the summer works.
Custom House is about 1 mile south of Canning Town, in Greater London. Looking for mastic sealing in Custom House? We can help. Custom House is one of 764 places we cover in Greater London for mastic joints.
We cover the E16 and E13 postcode districts for mastic joints. For a building on Tree Road, Ethel Road and Booth Road or nearby, we can quote for mastic joints. Main routes into Custom House include the A1020, useful when we plan access and materials. Sites close to Custom House are covered too, including West Silvertown (1 mile south-west), Silvertown (1 mile south), Canning Town (1 mile north), Royal Docks (1 mile east) and Limmo Peninsula (1 mile west). Further afield, our area takes in London (5 miles west), City of Westminster (8 miles west), Marylebone (8 miles west), Kensington (10 miles west), St Pancras (6 miles west) and Shoreditch (5 miles west).
Landmarks near Custom House
We work on buildings around Thames Barrier Park, The Royal Docks Community School and Royal Docks Academy. Custom House has its own railway station: Custom House station. Well-known places in the area include Gallions Reach Shopping Park (2.2 miles east) and Charlton Athletic Museum (1.5 miles south). Green spaces nearby include Gilbert's Pit and Tower Hill.
Doing it in-house
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.
Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
What happens if it’s left?
Adding sealant to cyclical maintenance is an easy win. Leaving it until there’s a leak turns it into reactive work with less control over timing. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
There’s no price list, because the scope varies so much from one building to the next. Call for a quote and we will price your job on its own details.
Why us?
- Fully insured
- One number for every site we cover
- RAL and finish matching where the product range allows
- Our applicators hold CSCS cards
Take a look at how commercial sealant jobs are priced or our accreditations and insurance.
Nearby places to Custom House
Also in Custom House
Surface by surface
Communal areas
Joints at low level in communal areas take knocks from bins, bikes and buggies and tend to fail first.
Planned maintenance
Adding mastic to planned maintenance avoids reactive repairs and keeps budgets predictable.
What affects the price in Custom House
To price the job, we consider:
- Site requirements such as inductions and permits
- Backing rod, priming and other preparation
- How accessible the joints are
- Quantities, in metres or numbers
The specified product makes a difference, and so does the preparation, from cutting out to priming and backing rod. Access, phasing and site rules also count.
What we need to price the job
It doesn’t need to be a full survey. These details are enough to start:
- Where the site is, with the postcode
- Whether an asbestos survey exists
- Photos of the joints, close up and from further back
- Any dates the work must fit around
The quickest route to a quote is a few photographs and the site postcode. Send them through the quote form, or call 01277 525 020 or send details through our quote form to discuss it first.
Work for main contractors and building owners
If you look after buildings for someone else, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.
For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.